The goal of this interventional, monocentric, prospective, single-masked, case-control study is to evaluate the efficacy of Thealoz Duo (artificial tear containing trehalose 3 g and hyaluronic acid 0.15 g) in comparison to a saline solution (Hydrabak containing Sodium Chloride 0,9 g, Sodium Dihydrogen Phosphate Dihydrate, Disodium Hydrogen Phosphate Dodecahydrate), to reduce the signs of ocular discomfort and ocular side effects in patients who have received Intravitreal injections. The main questions it aims to answer are: * can ocular instillation of Thealoz Duo solution, 1 week before intravitreal injection, in a fixed dose regimen, prevent ocular surface changes and dry-eye signs? * can ocular instillation of Thealoz Duo solution, up 3 months after intravitreal injections, in a fixed dose regimen, reduce ocular surface changes, and dry-eye signs with improvement of quality of life and quality of vision? Each participant will be randomized into each of two arms: 1. TREATMENT ARM: patients who will receive the instillation of Thealoz Duo, 10 ml, 1 drop, 4 times/day; 2. CONTROL ARM: patients who will receive the instillation of saline solution (Hydrabak), 10 ml, 1 drop, 4 times /day; The decision of inclusion of a control group should minimize the risk of breaking the blinding condition by affecting the consistency and reliability of the outcome's achievement. In any case, the instillation of saline solution should not alter the ocular surface.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
60
THEALOZ DUO is a solution containing trehalose (3%), sodium hyaluronate (0.15%), sodium chloride, trometamol, hydrochloric acid, and water for injections; Hydraback is a solution containing a sodium chloride 0.9 %, sodium dihydrogen phosphate dihydrate, sodium phosphate dodecahydrate, water for preparations for injection.
Hydrabak is an ophthalmic solution containing: sodium chloride 0.9%, sodium dihydrogen phosphate dihydrate, sodium phosphate dodecahydrate, and water for injectable preparations
IRCCS Ospedale San Raffaele _O.U. Ophthalmology
Milan, Italy
RECRUITINGAdministration of Ocular Surface Disease Index (OSDI) to the patient
The primary outcome is to evaluate the improvement of the dry-eye signs and changes in the ocular surface in patients who have received the intravitreal injections through the administration of Ocular Surface Disease Index (OSDI) at baseline, at month 1 and month 3 after the intravitreal injections.
Time frame: 3 months and 1 week
administration of Visual Analog Scale for Pain to the patient
The Visual Analogue Scale measures pain intensity and consists of a 10cm line, with two endpoints representing 0 ('no pain') and 10 ('pain as bad as it could be').
Time frame: 3 months and 1 week
evaluation of matrix metalloproteinase 9 gene expression
The secondary outcome is to evaluate the improvements of ocular surface and signs related to dry eye disease, through: -evaluation of matrix metalloproteinase 9 gene expression.
Time frame: 3 months and 1 week
TearLab Osmolarity
The secondary outcome is to evaluate the improvements of ocular surface and signs related to dry eye disease, through: -TearLab Osmolarity.
Time frame: 3 months and 1 week
Schirmer's test
The secondary outcome is to evaluate the improvements of ocular surface and signs related to dry eye disease, through: -Schirmer's test.
Time frame: 3 months and 1 week
tear film Break Up Time (tBUT)
The secondary outcome is to evaluate the improvements of ocular surface and signs related to dry eye disease, through: -tear film Break Up Time (tBUT).
Time frame: 3 months and 1 week
conjunctival hyperemia according to Efron grading scale
The Efron grading scale describe the severity of contact lens complications (grade 0: normal; grade 1: trace; grade 2: mild; grade 3: moderate; grade 4: severe).
Time frame: 3 months and 1 week
fluorescein staining
The secondary outcome is to evaluate the improvements of ocular surface and signs related to dry eye disease, through: -fluorescein staining.
Time frame: 3 months and 1 week
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